A new species of Cladaitina Maheshwari & Meyen, 1975 (cordaitalean pollen) from Uppermost Permian deposits of the Famatina Range, Central Western Argentina

Abstract

-A new cordaitalean pollen species of Cladaitina Maheshwari & Meyen, namely Cladaitina veteadensis is described from the Upper Permian strata of Argentina. The morphology of these dispersed pollen grains were studied using light and scanning electron microscopy. Detailed comparisons are made with similar commonly recorded sporae dispersae incertae sedis forms mainly recorded from other Late Permian palynofloras elsewhere. Cladaitina veteadensis sp. nov. constitutes a characteristic and common component of a rich palynological assemblage found in the upper part of the La Veteada Formation, Famatina Range, La Rioja province, central-western Argentina. More than 40 genera of pollen grains, spores, algae and fungi were recognized in this assemblage that they collectively suggest a latest Permian age. The presence of the genus Cladaitina in Argentina can be considered as a first evidence of the occurrence of Rufloriaceae in Gondwana.

Epidermal morphology of the cordaitalean leaf Noeggerathiopsis brasiliensis nom. nov. from the southern Paraná Basin (Lower Permian, Rio Bonito Formation) and paleoenvironmental considerations

“…4G). They are very similar to Cladaitina Maheshwari & Meyen, which was found associated to Cladostrobus Zalessky, a putative reproductive organ of the Angaran Rufloriaceae (Maheshwari & Meyen 1975) and was also reported from palynological assemblages in Permian strata of Argentina and attributed to Cordaitales (Zavattieri & Gutiérrez 2012).…”

Palynology of the la Veteada Formation (Lopingian) at Its Type Locality, Famatina Range, la Rioja Province, Argentina. Spores

“…Gutiérrez et al (2011) studied the diverse palynological assemblage from the lowest exposures of the unit in the Sierra de Narváez, Catamarca Province, central-western Argentina. Later, Zavattieri and Gutiérrez (2012), Gutiérrez et al (2014) and Zavattieri et al (2017) reported palynofloras (in part) from the type section of the La Veteada Formation (previously known as La Yesera Formation) exposed at the eastern end (28° 34′ S; 68° 45′ W) of the Famatina Range, north La Rioja Province (Fig. 1.1).…”

Age constraints of the Guttulapollenites hannonicus–Cladaitina veteadensis Biozone in Argentina reveal the first record of Early Triassic (Olenekian) palynofloras in Western Gondwana

“…Remarks . Zavattieri and Gutiérrez (2012) described Cladaitina veteadensis having the exoexine ornamented mainly equatorially and distally by grana and small verrucae closely spaced, usually coalescent at their bases that may form rugulae of variable development and/or having appearance of an irregular and small negative reticulum. The specimens resemble Densipollenites magnicorpus Tiwari and Rana (1981); both species were described as pollen grains usually bigger than 100µm, with a dark subcircular central body and saccus, but the Indian species differs in its intrareticulate exoexine.…”

“…The specimens resemble Densipollenites magnicorpus Tiwari and Rana (1981); both species were described as pollen grains usually bigger than 100µm, with a dark subcircular central body and saccus, but the Indian species differs in its intrareticulate exoexine. Inaperturopollenites nebulosus Balme was considered by Zavattieri and Gutiérrez (2012) a probable synonym of C. veteadensis specimens without an internal body. Interestingly, I. nebulosus has been identified in several Early Triassic assemblages (Hankel 1993; Hermann et al 2012; Jha et al 2018).…”